pirarucu

/ˌpɪrəˈruːkuː/
noun
  1. A very large freshwater fish found in the Amazon River basin, known for its size (up to 3 meters long) and its ability to breathe air.
    • The pirarucu is one of the largest freshwater fish in the world.
    • Because the pirarucu breathes air, it comes to the surface every few minutes.
    • Fishermen in Brazil often hunt the pirarucu for its meat and leather.
Synonyms